diff options
| -rw-r--r-- | target-arm/translate.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/target-arm/translate.c b/target-arm/translate.c index e6e8c6835a..c582d4beaa 100644 --- a/target-arm/translate.c +++ b/target-arm/translate.c @@ -1589,6 +1589,15 @@ static void disas_arm_insn(CPUState * env, DisasContext *s) case 0x5: case 0x6: case 0x7: + /* Check for undefined extension instructions + * per the ARM Bible IE: + * xxxx 0111 1111 xxxx xxxx xxxx 1111 xxxx + */ + sh = (0xf << 20) | (0xf << 4); + if (op1 == 0x7 && ((insn & sh) == sh)) + { + goto illegal_op; + } /* load/store byte/word */ rn = (insn >> 16) & 0xf; rd = (insn >> 12) & 0xf; |